Full spatiotemporal control of laser-excited periodic surface deformations
Abstract
We demonstrate full control of acoustic and thermal periodic deformations at solid surfaces down to sub-nanosecond time scales and few-micrometer length scales via independent variation of the temporal and spatial phase of two optical transient grating (TG) excitations. For this purpose, we introduce an experimental setup that exerts control of the spatial phase of subsequent time-delayed TG excitations depending on their polarization state. Specific exemplary coherent control cases are discussed theoretically and corresponding experimental data are presented in which time-resolved x-ray reflectivity measures the spatiotemporal surface distortion of nanolayered heterostructures. Finally, we discuss examples where the application of our method may enable the control of functional material properties via tailored spatiotemporal strain fields.
Keywords
Cite
@article{arxiv.1906.05487,
title = {Full spatiotemporal control of laser-excited periodic surface deformations},
author = {J. -E. Pudell and M. Sander and R. Bauer and M. Bargheer and M. Herzog and P. Gaal},
journal= {arXiv preprint arXiv:1906.05487},
year = {2019}
}
Comments
10 pages, 4 Figures